selective breeding

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  • selective breeding
    • selective breeding is when plants and animals with certain desirable charateristics are chosen to breed together
      • this will make the offspring which are produced inherit these characteristics
        • this produces new breeds of animal and new varieties of plants
    • selective breeding has been happening for over thousands of years, but more recently genetic engineering has been developed as a way of manipulating genetics
    • selective breeding in plants
      • plants with good features are crossed e.g plants that have good yield, drought tolerant and need less fertiliser
      • plants grow from seeds of these crosses are selected for their good features and crossed with each other
      • selection and crossing is repeated many times until a highly yielding variety is produced
    • reasons for selective breeding
      • disease resistance
      • increased yield
      • faster growth
      • better ability to cope with difficult conditions
      • better flavour

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